MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 214

• Manufacturer Part Number: MC68HC908SR12CFA
• Description: MICROCONTROLLER 48 PIN
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908SR12CFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, Temp Sensor
• Number Of I /o: 31
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Q1145673

Pulse Width Modulator (PWM)
13.4 PWM Period and Resolution
Data Sheet
214
PWMDR = 256
PWMDR = 128
PWMDR = 255
NOTE:
PWMDR = 1
T =
P
CLK
1
T
The PWM period is equal to
P
(PWMDR) defines the period where the PWM output is high, the low
period is equal to 256 minus that value. Each PWM channel has its own
counter and I/O control bits so it can be turned on and off independently.
Figure 13-3
different values in the PWM data register.
CLK
Figure 13-3. PWM Output Waveforms
is the PWM counter clock. The value in the PWM data register
128 × T
Pulse Width Modulator (PWM)
shows the PWM output waveforms for a channel with
PWM PERIOD = 256 × T
255 × T
255 × T
256
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
×
-------------- -
P
CLK
1
, resolution is
128 × T
Freescale Semiconductor
-------------- -
P
CLK
1
T
, where